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Parallel combined spread spectrum communication method of variable combination

A spread spectrum communication and variable technology, applied in the field of communication, can solve problems such as increased reception bit error rate and interrupted communication

Inactive Publication Date: 2014-09-17
HARBIN ENG UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

The conventional parallel combination spread spectrum communication method sends a fixed number of r sequences each time, but when the channel is sharply bad, it still sends a large number of r sequences, which will cause an increase in the receiving bit error rate, or even interrupt communication

Method used

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  • Parallel combined spread spectrum communication method of variable combination
  • Parallel combined spread spectrum communication method of variable combination
  • Parallel combined spread spectrum communication method of variable combination

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Embodiment Construction

[0032] Hereinafter, the present invention will be described in more detail with examples in conjunction with the accompanying drawings:

[0033] Combine Figure 1~2 , Step 1: The transmitted k-bit data is marked as d k ,d k-1 ,...,D 2 ,d 1 , Each information data period is T d , Where KT d =LT c , L is the number of symbols in each PN sequence, T c Is the chip period; the k-bit transmission information is sent to the serial / parallel converter to obtain k-channel signals; the k-bit data is converted into a decimal value according to the weighted position relationship:

[0034] N d = d k 2 k - 1 + . . . . d 2 2 1 + d 1 2 0 = X i = 1 k d i 2 i - 1

[0035] Compare N successively d with r s =1,2,...,r-1, find the smallest r that satisfies the above formula s , As the minimum number of sequences sent this time

[0036] r s = min { 1 ≤ r s ≤ r - 1 } N ...

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Abstract

The invention aims at providing a parallel combined spread spectrum communication method of a variable combination. The parallel combined spread spectrum communication method of the variable combination utilizes a data compressor to confirm at least dispatched order quantity r s in the transmission according to information quantity, r s plus 1 is equal to or larger than 1 and equal to or smaller than r, and r is the largest dispatched order quantity of a system. The parallel combined spread spectrum communication method of the variable combination well solves the problem that high spread spectrum grain influences system transmitted energy and well solves contradiction of high-speed transmission and bandwidth. The parallel combined spread spectrum communication method of the variable combination reduces dispatched order quantity to enable receiving effect to be better, is in favor of distinguishing which order to be dispatched and enables energy of each dispatched order to increase. When the spread spectrum gain is higher, a spreading code L is larger, and effect of reducing transmission order quantity of the parallel combined spread spectrum communication method of the variable combination is more obvious.

Description

Technical field [0001] The invention relates to a communication method. Background technique [0002] Modern communication has increasingly higher requirements for communication effectiveness and efficiency. Parallel combined spread spectrum communication is an improved method of soft spread spectrum communication. It is a spread spectrum communication method with higher communication efficiency and inherits the advantages of conventional spread spectrum communication such as anti-interference. The parallel combined spread spectrum communication method has been well received by scholars at home and abroad, and has been introduced in academic journals by scholars at home and abroad. The conventional parallel combined spread spectrum communication method sends a fixed number of r sequences each time, but when the channel is drastically bad, still sending a large number of r sequences, it will cause the receiving error rate to increase, even Interrupt communication. Summary of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7115
Inventor 李北明郭黎利张文超刘佳鑫娄西振
Owner HARBIN ENG UNIV
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